CN105590083A - Photoelectric fingerprint identification device - Google Patents
Photoelectric fingerprint identification device Download PDFInfo
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- CN105590083A CN105590083A CN201410571618.3A CN201410571618A CN105590083A CN 105590083 A CN105590083 A CN 105590083A CN 201410571618 A CN201410571618 A CN 201410571618A CN 105590083 A CN105590083 A CN 105590083A
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Abstract
The invention discloses a photoelectric fingerprint identification device. A finger presses against one optical receiving surface of a photoelectric sensor; the photoelectric sensor is used for receiving at least one optical strength signal of an invisible light passing through the finger; the photoelectric sensor converts the optical strength signal into at least one optical current signal and transmits the optical current signal to an analog-to-digital converter; the analog-to-digital converter converts the optical current signal into at least one digital signal and the at least one digital signal is transmitted to an image processor; and the image processor outputs a fingerprint image according to the digital signal.
Description
Technical field
The application relates to fingeprint distinguisher field, and being specifically related to one has about photo-electric identification of fingerprint and fillPut.
Background technology
So-called identification of fingerprint, as the term suggests be exactly to utilize exclusive finger print information on human finger to carry out identification.Common fingeprint distinguisher can be made up of two kinds of elements. One is fingerprint sensor (FingerprintSensor), main purpose is to gather one piece of complete fingerprint image. Another element is for identification of fingerprint is calculatedMethod (FingerprintAlgorithm). When the fingerprint sensor of front end gathers after fingerprint image, be follow-uplyTransfer to algorithm to carry out fingerprint image and process with fingerprint feature point and extract, generate after fingerprint template original fingerprintImage abandons, and finally carries out fingerprint comparison again.
Common fingerprint sensor has two kinds of condenser type (Capacity) and optical profile types (Optical). Electric capacity at presentFormula fingerprint sensor common are RF capacitance sensing, pressure-sensing, thermal sensing etc. Its principle is by heightThe microminiaturized sensor such as capacitance sensor or pressure sensor of density is integrated among a chip, treats handWhile referring to press chip surface, inside micro capacitance sensor can produce according to the crest of fingerprint and trough gatheringThe raw different quantities of electric charge (or temperature difference), and then form fingerprint image.
The advantage of capacitance type sensor is slimming and miniaturization, can be used in a large number on hand-held device,But its shortcoming is that the high and durability of cost enjoys test. And capacitance type sensor for maintain certain byPressure surface is long-pending must cut full wafer wafer, so the cost of each chip institute output is quite high. Moreover, due to electricityCapacity sensor itself is exactly exposed semiconductor chip, easily because sweat and the soda acid shadow of finger itselfRing, corrode and easily produce electrostatic problem and chip surface is produced, make the resistance to of capacitance type sensorDegree of being subject to and service life significantly reduce. Therefore, just have on capacitance type sensor surface and increase and paste one deck sapphireSubstrate is to protect, but relative also raising cost of manufacture.
In addition, optical fingerprint sensor is fingerprint collecting equipment the earliest, be utilize light source, Mitsubishi's mirror,Charged Coupled Device (CCD) forms a set of fingerprint collecting equipment. Utilize after finger presses Mitsubishi mirror, to refer toThe crest of line and trough be for absorption and the destruction of light total reflection, and then obtain one piece of fingerprint image, thenVia Charged Coupled Device (CCD) by image capture and output. Due to the collection of optical fingerprint sensorMode is non-contact chip itself, and namely the fingerprint place of pressing is by the optical module such as acryl or glassInstitute forms, therefore the advantage of optical profile type maximum is exactly cheap and durable. But optical fingerprint sensor because ofFor its volume is large and assembling is complicated, be difficult to apply to hand-held device inside
Therefore known capacitive fingerprint sensing device have be easily subject to environment electrostatic influence and cost of manufacture highProblem, optical fingerprint sensor has volume and cannot be applied to greatly the problem of hand-held device. CauseHow this, design a kind of environment electrostatic influence, volume fingerprint little and reduction cost of manufacture avoided and distinguishKnow device, just become this case inventor problem to be solved.
Summary of the invention
In view of known capacitive fingerprint sensing device have be easily subject to environment electrostatic influence and cost of manufacture highProblem, optical fingerprint sensor has volume cannot be applied to greatly hand-held device, and tolerance level and makingBy lower problem of life-span. Therefore main purpose of the present invention is to provide a kind of photo-electric identification of fingerprintDevice, to solve the problem that volume is large, easy affected by environment and cost of manufacture is high.
In order to address the above problem, the application has disclosed a kind of photo-electric fingeprint distinguisher. According to thisBright disclosed photo-electric fingeprint distinguisher, a fingerprint of pointing in order to identification one. Photo-electric fingerprint is distinguishedIdentification device comprises a photoelectric sensor, an analog-digital converter and an image processor. Wherein, photoelectricitySensor has an optical receiving surface, uses for finger contact at optical receiving surface. Photoelectric sensor in order toReceive at least one luminous intensity signal that a non-visible light penetrates finger, and convert to according to this luminous intensity signalAt least one photoelectric current signal. Analog-digital converter is electrically connected at photoelectric sensor, in order to receive photoelectricityStream signal. Analog-digital converter is to convert photoelectric current signal at least one digital signal. Image processingDevice is electrically connected at analog-digital converter, in order to receive digital signal. Image processor is that numeral is interrogatedNumber be output into a fingerprint image.
Compared with prior art, the application can obtain and comprise following technique effect:
Effect of the present invention is to utilize photoelectric sensor to receive and penetrates the non-visible light of finger, and byThe non-visible light of environment light source penetrates the luminous intensity signal otherness of dermatoglyph trough and the dermatoglyph crest of finger,Make photoelectric sensor be convertible into different strong and weak photoelectric current signals, then be aided with analog-digital converter will be notConvert corresponding digital signal to strong and weak photoelectric current signal, export the fingerprint of comparison of light and shade striped with thisImage, and then improve identification of fingerprint rate.
Therefore by light, thin, short, the little characteristic of photoelectric sensor, photo-electric of the present invention is referred toLine device for identifying can be applicable to hand-held device inside, can solve the optical fingerprint identification body of known techniquesLong-pending excessive and cannot be used in the problem of hand-held device. And utilize non-visible light penetrate finger come identification refer toLine, the sensing mode of this kind of photodetachment, the capacitance type fingerprint identifier that can solve known techniques is easily subject toTo the problem of environment electrostatic influence, also make without the need for the sapphire substrate of known techniques the demand of protecting,Can significantly reduce cost of manufacture.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present application, forms of the applicationPoint, the application's schematic description and description is used for explaining the application, does not form the application'sImproper restriction. In the accompanying drawings:
Fig. 1 is the block schematic diagram of the photo-electric fingeprint distinguisher of first embodiment of the invention;
Fig. 2 is the configuration diagram of the photo-electric fingeprint distinguisher of first embodiment of the invention;
Fig. 3 is the configuration diagram of the photo-electric fingeprint distinguisher of second embodiment of the invention; And
Fig. 4 is the configuration diagram of the photo-electric fingeprint distinguisher of third embodiment of the invention.
Detailed description of the invention
Please refer to shown in the 1st figure and the 2nd figure, the photo-electric fingerprint that is respectively first embodiment of the invention is distinguishedThe block schematic diagram of identification device and configuration diagram. Photo-electric fingeprint distinguisher 10 comprises a photoelectric transferSensor 11 (PhotoelectronSensor), analog-digital converter 12 (A/DConverter) and a figurePicture processor 13. Wherein, photoelectric sensor 11 has an optical receiving surface 111, uses for referring on the other hand20 contacts thereon. Analog-digital converter 12 is electrically connected at photoelectric sensor 11. Image processor13 are electrically connected at analog-digital converter 12. In the present embodiment, can, by a circuit board 30, incite somebody to actionPhotoelectric sensor 11, analog-digital converter 12 and image processor 13 are separately positioned on circuit board 30Upper, by this by photoelectric sensor 11, analog-digital converter 12 and image processor 13 mutually electricallyConnect.
When finger 20 is by being pressed in after the optical receiving surface 111 of photoelectric sensor 11, can be by a surround lightingThe non-visible light IR1 in source is radiated on finger 20, and to make non-visible light IR1 be wave-length coverage betweenThe infrared radiation of 780nm to 3000nm, makes non-visible light IR1 penetrate the inner rear shape of finger 20Become scattered light, and penetrated at least one light intensity of finger 20 by photoelectric sensor 11 sensing non-visible light IR1Degree signal (IntensitySignal), and make photoelectric sensor 11 convert at least one according to luminous intensity signalPhotoelectric current signal (PhotocurrentSignal).
Should be noted, finger 20 surfaces have dermatoglyph trough 21 and dermatoglyph crest 22. When non-visibleWhen light IR1 penetrates out dermatoglyph trough 21 from pointing 20 inside, because dermatoglyph trough 21 is that contact is at lightReceiving surface 111, so non-visible light IR1 can directly enter into optical receiving surface by dermatoglyph trough 21111, and make photoelectric sensor 11 can receive one first stronger luminous intensity signal IS1. When non-visibleLight IR1 is when pointing 20 inside and penetrate out dermatoglyph crest 22, because of dermatoglyph crest 22 and optical receiving surfaceBetween 111, there is a clearance G, the non-visible light IR1 of part can be reflected by optical receiving surface 111,The non-visible light IR1 of part enters into optical receiving surface 111, and photoelectric sensor 11 can be receivedOne second weak luminous intensity signal IS2.
Thus, photoelectric sensor 11 can synchronously receive the first luminous intensity signal of dermatoglyph trough 21The second luminous intensity signal IS2 of IS1 and dermatoglyph crest 22. Photoelectric sensor 11 can be according to dermatoglyph troughThe first luminous intensity signal IS1 of 21 and convert one first photoelectric current signal PS1 to, same according to dermatoglyphThe second luminous intensity signal IS2 of crest 22 converts one second photoelectric current signal PS2 to.
In the present embodiment, photoelectric sensor 11 uses the light such as photovoltaic spy, light conduction or light transmitting conventionallyElectricity conversion regime carries out work. For instance, the special conversion regime of photovoltaic is present in two kinds of different materials conventionallyThe junction of material, in the time that non-visible light is irradiated to junction, junction two ends can produce an output relevant with illuminationVoltage, for example, utilize its p-n junction to carry out work with Semiconducting Silicon Materials, germanium or indium antimonide. LightConduction conversion regime is normally made with semi-conducting material, and its resistance can subtract along with the increase of illuminationFew, the generation of its electric conductivity be because material absorb incident photon with energy to produce electric charge carrier.Light transmitting conversion regime, when incident light energy is enough when high, makes electron detachment track and penetrates. Above-mentioned photoelectricityThe photoelectric conversion mode of sensor 11 is only an embodiment explanation, not as limit, and its photoelectric sensingDevice 11 can be selected according to user demand corresponding photoelectric conversion mode.
Therefore when photoelectric sensor 11 is by different strong and weak the first luminous intensity signal IS1 and the second light intensityDegree signal IS2 converts respectively corresponding the first photoelectric current signal PS1 and the second photoelectric current signal PS2 toAfter, can divide supplementary biography by different strong and weak the first photoelectric current signal PS1 and the second photoelectric current signal PS2Deliver to analog-digital converter 12. Analog-digital converter 12 is according to the first photoelectric current signal PS1 and theTwo photoelectric current signal PS2 and convert corresponding at least one digital signal (DigitalSignal) to. Afterwards,Digital signal DS is sent to image processor 13 by analog-digital converter 12, and make image processor13 convert a fingerprint image to according to digital signal DS.
Refer to shown in Fig. 3, for the framework of the photo-electric fingeprint distinguisher of second embodiment of the invention showsIntention. Its detailed description of the invention and aforementioned the first embodiment are roughly the same, below only with regard to different part in additionIllustrate, all the other exist together and repeat no more mutually.
In the present embodiment, more comprise at least one luminescence component 14. By luminescence component 14 to pointing 20Send non-visible light IR2, make the penetrable finger of non-visible light IR2 20 inside, and then strengthen dermatoglyphLuminous intensity pair between the first luminous intensity signal of trough 21 and the second luminous intensity signal of dermatoglyph crest 22Ratio. Should be noted, the environment light source of photoelectric sensor 11 arround can detecting, if environment light source is non-When visible ray is not enough, photoelectric sensor 11 can start immediately luminescence component 14 and operate, and through sending outOptical assembly 14 increases the non-visible light IR2 intensity to pointing 20.
Refer to shown in Fig. 4, for the framework of the photo-electric fingeprint distinguisher of third embodiment of the invention showsIntention, its detailed description of the invention and aforementioned the first embodiment are roughly the same, below only with regard to different part in additionIllustrate, all the other exist together mutually and are not repeating.
In the present embodiment, more comprise at least one luminescence component 14 and at least one scattering medium 15. Wherein,Scattering medium 15 is the optical receiving surfaces 111 that are coated on photoelectric sensor 11, but not as limit. ?Good embodiment is the optical receiving surface 111 that scattering medium 15 can envelope photoelectric sensor 11 simultaneouslyAnd surrounding side 112, and make luminescence component 14 corresponding to scattering medium 15. Should be noted, send outThe non-visible light IR3 that light source part 14 sends can enter into scattering by the side of photoelectric sensor 11 112Medium 15 inside, and make non-visible light IR3 be dispersed in uniformly scattering medium 15 inside, scattering is situated betweenMatter 15 can have the uniform non-visible light IR3 energy of diffusion with respect to the region of finger 20.
Therefore scattering medium 15 makes the irradiation of uniform and whole of non-visible light IR3 point 20 inside,Because the dermatoglyph trough 21 of finger 20 touches the scattering medium 15 directly over optical receiving surface 111,So non-visible light IR3 directly enters into photoelectric sensing by scattering medium 15 by light contact surface 111Device 11 inside. And between dermatoglyph crest 22 and light contact surface 111, there is clearance G (as shown in Figure 1),So the part non-visible light IR3 being passed by dermatoglyph crest 22 can be reflected by light contact surface 111, portionDivide non-visible light IR3 to enter into photoelectric sensor 11 inside, use and strengthen dermatoglyph trough 21 and dermatoglyphThe otherness of luminous intensity between crest 22.
Therefore photo-electric fingeprint distinguisher proposed by the invention is to utilize photoelectric sensor to receivePenetrate the non-visible light of finger, and penetrate dermatoglyph trough and the skin of finger by the non-visible light of environment light sourceThe luminous intensity signal otherness at ripple peak, makes photoelectric sensor be convertible into different strong and weak photoelectric current newsNumber, then be aided with analog-digital converter and numeral news corresponding to different strong and weak photoelectric current signals convert toNumber, export the fingerprint image of comparison of light and shade striped with this, and then improve identification of fingerprint rate. Therefore byThe characteristic that photoelectric sensor is light, thin, short, little, can answer photo-electric fingeprint distinguisher of the present inventionBe used in hand-held device inside, the optical fingerprint identifier volume that can solve known techniques is excessive and cannot useIn the problem of hand-held device. And utilize non-visible light to penetrate finger and come identification fingerprint, this kind of photodetachmentSensing mode, the capacitance type fingerprint identifier that can solve known techniques is easily subject to environment electrostatic influenceProblem, also makes without the need for the sapphire substrate of known techniques the demand of protecting, and can significantly reduce and be made intoThis.
Above-mentioned explanation illustrates and has described some preferred embodiments of the application, but as previously mentioned, should manageSeparate the application and be not limited to disclosed form herein, should not regard the eliminating to other embodiment as,And can be used for various other combinations, amendment and environment, and can be in invention contemplated scope described herein,Technology or knowledge by above-mentioned instruction or association area are changed. Change and those skilled in the art carry outThe spirit and scope moving and variation does not depart from the application, all should be in the protection of the application's claimsIn scope.
Claims (5)
1. a photo-electric fingeprint distinguisher, a fingerprint of pointing in order to identification one, is characterized in that,Described photo-electric fingeprint distinguisher comprises:
One photoelectric sensor, has an optical receiving surface, and described finger is to contact at described optical receiving surface,Described photoelectric sensor penetrates at least one luminous intensity signal of described finger, institute in order to receive a non-visible lightState photoelectric sensor and convert at least one photoelectric current signal to according to described luminous intensity signal;
One analog-digital converter, is electrically connected at described photoelectric sensor, in order to receive described photoelectric currentSignal, described analog-digital converter converts at least one digital signal to according to described photoelectric current signal; WithAnd
One image processor, is electrically connected at described analog-digital converter, in order to receive described numeral newsNumber, described image processor is output into a fingerprint image according to described digital signal.
2. photo-electric fingeprint distinguisher as claimed in claim 1, wherein said optical receiving surface withThe plural dermatoglyph trough of described finger is in contact with one another, and described photoelectric sensor receives described non-visible light and wearsAt least one the first luminous intensity signal, described optical receiving surface and the described finger of saturating described plural dermatoglyph troughDescribed plural dermatoglyph crest between be formed with respectively a gap, described photoelectric sensor receives described non-Visible ray penetrates at least one second luminous intensity signal of described plural dermatoglyph crest, described the first luminous intensity newsNumber be greater than described the second luminous intensity signal.
3. photo-electric fingeprint distinguisher as claimed in claim 1, wherein more comprises at least one luminousAssembly, in order to send described non-visible light to described finger.
4. photo-electric fingeprint distinguisher as claimed in claim 1, wherein more comprises at least one luminousAssembly and at least one scattering medium, described scattering medium envelopes the described light-receiving of described photoelectric sensorSurface, described finger is to contact at described scattering medium, described luminescence component sends described scattering mediumDescribed non-visible light.
5. photo-electric fingeprint distinguisher as claimed in claim 4, wherein said scattering medium more wrapsCover residence and state the surrounding side of photoelectric sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410571618.3A CN105590083A (en) | 2014-10-23 | 2014-10-23 | Photoelectric fingerprint identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410571618.3A CN105590083A (en) | 2014-10-23 | 2014-10-23 | Photoelectric fingerprint identification device |
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| Publication Number | Publication Date |
|---|---|
| CN105590083A true CN105590083A (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410571618.3A Withdrawn CN105590083A (en) | 2014-10-23 | 2014-10-23 | Photoelectric fingerprint identification device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106845436A (en) * | 2017-02-10 | 2017-06-13 | 京东方科技集团股份有限公司 | Fingerprint identification module, fingerprint identification method and touch screen |
| CN108985136A (en) * | 2017-06-02 | 2018-12-11 | 旭景科技有限公司 | Noise reduction interrogates condenser type image sensor and its operating method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001086293A (en) * | 1999-09-10 | 2001-03-30 | Casio Comput Co Ltd | Reader |
| CN1400666A (en) * | 2001-07-30 | 2003-03-05 | 卡西欧计算机株式会社 | Light sensor system and image reading method |
| TW201011378A (en) * | 2008-09-04 | 2010-03-16 | Au Optronics Corp | Display module |
| CN102955936A (en) * | 2011-08-24 | 2013-03-06 | 金佶科技股份有限公司 | Panel for fingerprint contact |
-
2014
- 2014-10-23 CN CN201410571618.3A patent/CN105590083A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001086293A (en) * | 1999-09-10 | 2001-03-30 | Casio Comput Co Ltd | Reader |
| CN1400666A (en) * | 2001-07-30 | 2003-03-05 | 卡西欧计算机株式会社 | Light sensor system and image reading method |
| TW201011378A (en) * | 2008-09-04 | 2010-03-16 | Au Optronics Corp | Display module |
| CN102955936A (en) * | 2011-08-24 | 2013-03-06 | 金佶科技股份有限公司 | Panel for fingerprint contact |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106845436A (en) * | 2017-02-10 | 2017-06-13 | 京东方科技集团股份有限公司 | Fingerprint identification module, fingerprint identification method and touch screen |
| US10509942B2 (en) | 2017-02-10 | 2019-12-17 | Boe Technology Group Co., Ltd. | Fingerprint identification device, fingerprint identification method and touch screen |
| CN106845436B (en) * | 2017-02-10 | 2020-06-02 | 京东方科技集团股份有限公司 | Fingerprint identification module, fingerprint identification method and touch screen |
| CN108985136A (en) * | 2017-06-02 | 2018-12-11 | 旭景科技有限公司 | Noise reduction interrogates condenser type image sensor and its operating method |
| CN108985136B (en) * | 2017-06-02 | 2021-08-24 | 旭景科技有限公司 | Noise reduction capacitive image sensor and operation method thereof |
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Application publication date: 20160518 |
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